Concealed
Purlin Cleat
FOR HIDDEN TIE DOWN TO TOP
OF SUPPORT
APPLICATION
The Concealed Purlin Cleat is an economical hidden
bracket for fixing purlins to top of rafters, or trusses to
top of walls to resist wind uplift.
INSTALLATION:
1. Fix Concealed Purlin Cleat to side of rafter and top of
support.
2. Fix 4 MiTek MSA1430 screws through the base of the
cleat into the support. (use longer MiTek MSA1465
screws if fixing down to double top plates).
3. Fix 4 MiTek MSA1430 screws through large holes into
the side of the rafter.
Truss to
Top Plate fixing
4 screws into truss
4 screws into support
USES
Concealed Purlin Cleats provide
a fast and easy method of
anchoring purlins, rafters and
trusses to the top of supports
away from view.
They are also useful for fixing
timber plates on top of block
walls.
ADVANTAGES
Purlin to Rafter
fixing
4 screws
into purlin
4 screws
into support
• No fixing to side of support
required.
• Hidden from view.
Rafter to
Ridge Beam
fixing
• Resists wind uplift.
4 screws
into rafter
4 screws
into support
This Engineered Building Product complies with
AS/NZS 1170 Loading Code
• Quick and easy to apply, no
nails required.
Concealed Purlin Cleat
FOR FIXING PURLINS TO RAFTERS
80
SPECIFICATION:
Steel:
Grade G300
Thickness 1.5mm TCT
Galvanized coating Z275
Screws: MSA1430 - MiTek No. 14 x 30mm anti-split self-drilling
HD galvanized screws
85
MSA1465 - MiTek No. 14 x 65mm anti-split self-drilling
HD galvanized screws for use in double top plates
Product Code:
CPC80
28
Load Direction
4 MiTek screws
4 MiTek screws
LOAD DATA:
The design capacity is based on the weaker joint group of either member. The capacity is doubled when a pair
of cleats is used in the connection.
Limit State Design Capacity per Concealed Purlin Cleat in Wind Uplift (kN)
Joint Group
Screw Size
J2
J3
J4
J5
JD2
JD3
JD4
JD5
JD6
MSA1430
8.8
6.6
4.8
3.9
9.9
9.9
7.5
5.6
4.1
MSA1465
11.0
7.8
5.6
4.1
11.0
11.0
7.8
5.6
4.1
Values in this table incorporate the capacity factor (Ø) for houses. For different building applications, multiply the design
capacities by the following factors. Refer to AS1720.1 for a full definition of each category and building application.
Category
Building application
Adjustment factor
1
House
1.00
2
Commercial/Industrial
0.94
3
Post-disaster function
0.88
DS8/11
Design capacities have been obtained from laboratory testing and procedures given in AS1720.1.
MiTek Australia Ltd.
ABN 98 004 564 587
46 Monash Drive Dandenong Sth
Victoria 3175 Australia
Telephone 03 8795 8888
Facsimile 03 9702 9464
Web site www.mitek.com.au
New South Wales 02 8525 8000
Queensland 07 3861 2100
South Australia 08 8234 1326
Western Australia 08 6218 5945
New Zealand 09 274 7109
Malaysia 603 3176 7473